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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Taxes [Line Items]      
Operating loss carryforwards $ 1,914,000 $ 1,387,000  
Valuation allowance for state tax net operating losses 108,000 108,000  
Unrecognized tax benefits 1,139,000 1,065,000 $ 459,000
Potential increase (decrease) in income tax provision 700,000 $ 700,000  
Net Interest income related to income tax refunds $ 2,500    
Minimum [Member]      
Income Taxes [Line Items]      
Operating loss carryforwards, expiration date Dec. 31, 2016    
Possible reduction in unrecognized tax benefits resulting from audit settlements $ 300,000    
Maximum [Member]      
Income Taxes [Line Items]      
Operating loss carryforwards, expiration date Dec. 31, 2035    
Possible increase in unrecognized tax benefits resulting from audit settlements $ 300,000